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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenue Recognition and Deferred Revenue [Abstract] |
Disaggregation of revenue | We disaggregate our revenue by geographical region as follows:
Net Sales |  | Three months ended June 30, | Six months ended June 30,
|  | 2021 |  | 2020 | 2021 |  | 2020
United States |  | $ | 347.9 |  |  | $ | 247.9 |  | $ | 624.1 |  |  | $ | 522.0 |
Iceland |  | 180.1 |  |  | 154.0 |  | 347.9 |  |  | 301.1 |
Total |  | $ | 528.0 |  |  | $ | 401.9 |  | $ | 972.0 |  |  | $ | 823.1 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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- References No definition available. + Details
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